I may be the only one in America working on this family. I am afraid the line is extinct except for descendants from the women like I.
If anyone finds anything on this, or a JOHN GUIBAL/poss. GUPPELL who came to Charleston and served on the Charleston Council in 1690s, please let me know. This family moved up to AMELIA TOWNSHIP, and the last Guphill I know of was William Guphill, buried about 1820 with impressive tombstone in the Quaker Cemetery in old Camden, SC.
Lot of us descendants, but no Guphills.
David in Texas